Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaefea6fcd1f650d…

MALICIOUS

PDF

73.6 KB Created: 2021-09-08 08:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03b38cc74b7e470ca444e0ab05d7122a SHA-1: 9a0ffce88e681a6bb059d7a92932d70c815cc800 SHA-256: eaefea6fcd1f650d7a4a6aad73770ce71c1b9c2d7b99783ba6fa7deecb88e50e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to external sites, including those hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of link farm heuristics and the specific detection of a 'Pdf.Phishing.Trojan' further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.sloepverhuur-debiesbosch.nl/upload/files/jebovo.pdf In PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/vuvonatapikiwagux.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a09e47d0137---81053059211.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/54344259309.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/59223911703.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/38144752668.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/gjv0jifegsk1e90d0c8lpdujf6/34392301133.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/xejuwiberetifunavo.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/nakuwojazenage.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/ksnshstji4c6nvemnbq2odvk29/42658870377.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b3540c789---44981219803.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202107070706015258.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b6c54f06---71280824628.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/44598324592.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/gedejifolinikisisa.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dca7754c2---3885054050.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/99534511627.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/721627984.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/6k866vgpqq7chvnc655vdkgnad/48716072456.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a3048219dff---99510562230.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608731298e05d---fuzezewagukuj.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/14180516168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=toshiba+no+frost+refrigerator+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5A 16472 bytes
SHA-256: 20247597a39db0e43534ee0b1a9c9a8c62307782ac53a341171d9da8f4828005
font_01_sfnt_off0000e845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE845 10864 bytes
SHA-256: c4925a91d450b4eecaa0bafd65b3ce957c267004b91aa7357a5dd38b11b3873a
font_02_sfnt_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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